摘要
混凝土失效机理为原始缺陷在载荷条件和腐蚀环境的作用下造成其损伤累积和性能劣化。由于混凝土破坏的混沌演化过程,为了表征混凝土单元不同损伤状态时的导热性能变化,采用主动式外热源激励和分辨率极高的红外成像仪捕捉其表面温度场,得到一系列红外热像图样本,分析和计算其分形维数,再用基于分形维数的损伤表征因子描述和表征混凝土不同损伤状态。涉及到混凝土导热-损伤耦合的理论研究和分形研究两大课题以及试验样本的提取。
Concrete failure mechanism of defects in the original load conditions and the corrosiveenvironment created under its cumulative damage and performance deterioration. As concrete damage chaotic evolution, characterized concrete modules to different injury to the state thermal conductivity changes, using active outside heat stimulation and high resolution infrared imaging devices to capture its surface temperature, be a series of infrared thermal images samples, analysis and calculation of its fractal dimension, thus reuse based on the fractal dimension of the damage variable definition and description of different characterization concrete injury state. This involves concrete thermal-injury coupling of theoretical study and fractal, and testing samples from two topics.
出处
《华中科技大学学报（城市科学版）》
CAS
2008年第2期23-25,共3页
Journal of Huazhong University of Science and Technology
基金
国家自然科学基金(5023804010672128)
关键词
混凝土
红外热像
导热-损伤耦合
分形方法
concrete
infrared thermograph
heat transfer-damage coupling
fractal method
